Tetra Pond Aquasafe Tetra Aquasafe 1 Litres immediately turns tap water into fish safe aquarium water. The new formula promotes healthy water and healthy fish through a patented, unique mix of natural substances and trace elements. AquaSafe creates water that more closely represents the natural habitats of fish and plants. How AquaSafe works: Substances in the tap water which are dangerous to fish are neutralised: Chlorine and chloramine are eliminated, heavy metals like copper, zinc and cadmium are bound completely. Essential elements that are present in natural environments are added: Iodine for vitality, magnesium for growth and well-being, vitamin B to support health stress resistance. Gils and membranes are supported by unique colloid ingredients. Bioextracts support the development of beneficial bacteria for clear water. NOTE: AquaSafe can be added directly to the aquarium water. A blue coloration may form which disappears immediately after use.Size: 1l